For my local events, I've gotten an HJC CL-15. It's got an M2005 rating, so any clubs or activities requiring an SA rating are out. But it's comfortable, reasonably light, looks pretty good, and it was $64 shipped to my door off eBay. For my weekend warrior stuff, it's plenty sufficient.
2004 SVT Focus
Custom front-bumper-mount bug guts; precision sprayed brake dust on OEM rims; 15% Pine Tree pollen over the clear coat.
No more SVT autocross, I drive the thing in the avatar.